Buffing or polishing wheel



Oct. 11, 1938. w HALL 2,132,532

BUFFING OR POLISHING WHEEL Filed Sept. 16, 1937 2 Sheets-Sheet 1 IE1129.2 13

HmllHnhlmln Amman-inn INVENTOR Elisha W Hall ATTORNEYS Oct. 11, 1938. E.w. HALL BUFFING OR POLISHING WHEEL Filed Sept. 16, 1937' 2 Sheets-Sheet2 INVENTOR -Elisha W Hall 4W, /W, M P M ATTORNEYS Patented Oct. 11, 1938UNITED STATES PATENT OFFICE ZOia-lms.

This invention relates to a novel and improved bufflng or polishingwheel. In connection with the finishing of tin plate or black ironsheets, long bufiing or polishing wheels or rolls are used,

usually made up of two or more axially elongated wheels placed and toend. Itpls desirable that the batting or polishing material be firmlycompacted by axial pressure, but heretofore the fact that the hubs havebeen non-compressible has prevented the desired compacting even whencupshaped clamping plates are employed and a pressure of twenty tonsexerted.

In accordance with this invention, the hubs are readily compressiblewhen supplied to the user, and thus it is possible I to compact thebuffing or polishing material to the desired extent even with flatclamping plates because the hubs present but little resistance and theirlength can be reduced enormously. Using a pressure of say twenty tons,the bufiing material can easily be reduced to one half, or even less,its original length. For example, a roll ninety-six inches long can besqueezed down to about forty-four to fifty inches.

The invention will best be understood by reference to the followingdescription when taken in connection with the accompanying drawingsillustrating the method and the product thereof, while its scope will bepointed out more particularly in the appended claims.

In the drawings:

Fig. 1 is an elevation of the face of one of the compressible disksemployed in making up the hub;

Fig. 2 is an edge elevation oi the same;

Fig. 3 is an elevation of a strip of bias-cut cloth to be employed asthe bufling or polishing material;

Fig. 4 is an elevation of the strip ruflied to reduce its length alongone of its edges;

Fig. 5 is a development of the ruified edge of ,the strip;

Fig. 6 is an elevation illustrating the mode of making up the hub;

Fig. 7 is an elevation, partly in vertical section, illustrating onemode of assembling the milled strip with the hub;

, Fig. 8 is a vertical, sectional view illustrating the mode ofcompressing the sleeve of bufling or 50 polishing material in an axialdirection without compressing the hub; and

Fig. 9 is a vertical, sectional view of a completed bufiing or polishingwheel in readiness to be shipped to the user.

55 Referring to the drawings and to the method and product illustratedtherein by way of example, and having reference at first to Fig. 1,there is shown a disk ll of readily compressible nature, the one shownconsisting of corrugated cardboard comprising two outer, flat sheets I3and an intermediate, corrugated sheet l5, all of which are adhesivelyunited. This material is readily compressible or collapsible because ofits cellular characteristic. The disk is provided with a central hole llof the required shape andv dimensions to fit the arbor on which it is tobe used, the hole shown being square.

One convenient way of building up a hub of the required length (see Fig.6) is to place disks one at a time upon a square arbor i9 which fits theholes I1, and to apply adhesive such as silicate to the upper face ofeach disk before placing another disk upon it. When the desired lengthhas been attained, the hub -is removedfrom the arbor and laid aside.

The bufilng or polishing material may be appropriate cloth such ascanton flannel, twill, duck, or sheeting, bias-cut to form a strip 2|(see Fig. 3). In this example, this strip is single ply, but plural plymay be employed if desired. The strip is prepared for use by shorteningone of its edges as by milling the same (see Figs. 2 and 3) and securingthe rufiles as by one or more, herein two rows 23 and 25 of stitches.This may conveniently be accomplished by the use of a two-needle sewingmachine equipped with a ruffiing attachment.

The next step may be varied somewhat, as desired. The strip may behelically wound and its convolutions adhesively secured together to forma sleeve which is then applied by adhesive to and about the hub, or thestrip may be helically wound about the hub and theconvolutionsadhesively secured to one another and to the hub as the windingprogresses. This latter way is preferred and is illustrated in Fig. 7.

This step is conveniently carried out by the use of a horizontallyrotatable turntable 21 to which is afiixed an upright, square arbor ofthe same dimensions as the opening in the hub, the turntable beingrotated by appropriate mechanism which it is deemed unnecessary to de-.scribe. First, a canvas or other suitable anchor disk 29, provided witha square opening the same size as the arbor is placed down about thelatter and upon the turntable. The upper surface of this disk is coatedwith adhesive, such as latex, either before or after being placed on thetumtable as by the use of a spray nozzle 3|.

The hub is then slipped downwardly about the arbor onto the coatedsurface of the disk. The hub is then temporarily lengthened by the useof a hub extension, herein a tube 33 whose descent is limited as byturning the inside of the tube to lit the hub snugly and to provide ashoulder 35 to rest upon the upper end of the hub. -The ruiiled strip,of indefinite length, has its free end laid upon the projecting marginof the disk and suitably secured in place as by a thin clamp.

The turntable is then rotated and the strip is helically coiled aboutthe hub, while adhesive such as latex is applied as by the nozzle to thesuccessive convolutions near the inner margin and to the peripheryot-the hub. This is continued until there is built up about the hub andabout the hub extension a sleeve which is much longer than the hubitself. Then the strip is severed, preferably at a point in line withthe first end.

The hub and its extension, with the sleeve thereon, is removed from thearbor and placed between upper and lower platens 31 and 39 of a powerfulhydraulic press, and with a hollow pressure member such as a tube 4ibetween the upper platen and the upper end of the cloth sleeve, so

' that it telescopes about the hub extension. The

length of this tube should be such that it will compress the clothsleeve to the desired extent without the upper platen striking the upperend of the hub extension; As a further precaution, or to permit theuseoi a shorter tube, the upper platen may be provided with an openingll of suflicient size to receive thehub extension. To prevent the clothsleeve from being compressed more than the'de'sired amount, stops in thenature of blocks may be placed at the sides of the cloth sleeve and thelower end 01 the tube 4i will strike them.

Power is then applied to the press, and its plunger 41 raises the lowerplaten. The compression and the consequent shortening of the clothsleeve should be continued until the sleeve is considerably shorter thanthe hub because the cloth, being resilient, will expand somewhat. Inpractice, the compression is continued to the point where after thepressure is removed, the length of the sleeve will approximate that ofthe hub. The assembly is then removed from the press and a second anchordisk 48 applied with adhesive such as latex. The completed wheel is nowready for shipment to the user. As before stated, when the wheel isassembled end to end with others on an arbor, and clamping pressureapplied, the hub, being readily compressible, yields and presents noobstacle to compression of the cloth sleeve to the desired extent.

. Having thus described the invention, what I claim and desire byLetters Patent to secure is:

l. A bufling or polishing wheel comprising, in combination, a hub whichis readily compressible in an axial direction, and a fabric sleeve aboutsaid hub, said sleeve being less readily compressible than said hub.

2. A bufling or polishing wheel comprising, in combination, a hubcomposed of a plurality of disks which are cellular in nature and whichrender said hub readily compressible in an axial direction, and a fabricsleeve about said hub, said sleeve being less readily compressible thansaid hub.

ELIBHA W. HALL.

